Carriage – Trailing cable Comms error
Last updated: February 22, 2026
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System error code: 86:01 on HP T790 T1300 T2300 Designjet Printer
System error code: 86:01 on HP T790 T1300 T2300 Designjet Printer See this video: https://youtu.be/Lhb-g4gKpKE Carriage ...
Trailing cable data lines cannot communicate correctly
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Check the Trailing cable from the Engine PCA to the Carriage PCA. Run the 08601 Checks Electronics service diagnostic. Replace the Trailing cable. Replace the Carriage PCA. Replace the Engine PCA.
Reference diagrams for common repair procedures related to this error:
Carriage Belt Replacement
Formatter Board Location & Connections
Note: These diagrams are for reference only. Always consult official HP service documentation and follow proper ESD precautions.
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A flexible flat cable that connects the carriage assembly to the main PCA, transmitting data and power signals to the printheads as the carriage moves.
The mechanism that moves the printheads back and forth across the media during printing. It rides on a guide rail and is driven by the scan-axis motor via a belt.
A numeric or alphanumeric code displayed on the printer's front panel or in diagnostic logs that identifies a specific hardware or software malfunction.
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